Advent of Code 2017 - Day 4 Solution - Python 3

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""Day 4: check for valid passwords: no duplicate words """

from collections import Counter

# Input file
with open('Day4input.txt', 'r') as f:
    # Parse lines into lists of separate strings
    passphrases = [s.strip().split() for s in f.read().splitlines()]


def valid(counter):
    """Test if passphrase has repeated words."""
    if any(x > 1 for x in counter.values()):
        return 0
    return 1


# Part 1
total = 0
for p in passphrases:
    total += valid(Counter(p))

print(total)

# Part 2
total2 = 0
for p in passphrases:
    # sort the words in the passphrase alphabetically to make Counting possible
    sorted_list = list(map(lambda x: ''.join(sorted(x)), p))
    c = Counter(sorted_list)
    total2 += valid(c)


print(total2)